Medline - Urinary Drainage Leg Bags with Straps (Twist Valve) come with straps attached that feature an adjustable button closure. The integrated drainage port empties the bag easily by twisting the valve. It also features an anti-flux valve that stops urine from flowing up the tubing. This catheter bag has a sterile fluid pathway and is available in a 20 oz or 32 oz size. This product is latex free.